Hydraulic press for mining purposes.



. Patefited Mar. 6, I900. m. & E. EAVES. HYDRAULIC PRESS FOR MINING PURPOSES.

No. 644,782. A. J. TONGE, J. TONGE (Application filed Aug. 2, 1899.) (No Model.) 2 Sheets-Sheet l.

W A w g 0 i m m. 5

1 DRRIS Piltns co. PK 0., wasnmcmN D No. 644.782. Patented Mar. 6, I900.

, J. TONGE, .IR. &. E. EAVES.

A. J. TONGE HYDRAULIC PRESS F08 MINING PURPOSES.

(Application filed Aug. 2, 1899.)

2 Sheets-Sheet 2.

(No Model.)

0., wAsmNew a c ATENT' OFFICE.

ALFRED JOSEPH TONGE AND JAMES TONGE, JR, or wnsrnouen'roiv, Aivi) ELAM EAVES, or DERBY, ENGLAND.

HYDRAULIC PRESS FOR MINING PURPOSES.-

SPEUIFICATION forming part of Letters Patent No. 644,782, dated March 6, 1900.

Application filed August 2, 1899.

To all whom it may concern.-

Be it known that we, ALFRED J OSEPH TONGE and JAMEs ToNoE, J r., residents of WVesthoughton, near Bolton, in the county of Lancaster, and ELAM EAvEs, a resident of Norfolk street,Derby,in the county of Derby, England, subjects of the Queen of Great Britain, have invented. certain new and useful Improvements in Hydraulic Presses for MiningPurposes,of which the following is a specification.

In the production of presses or rams for mining purposes,partioularly that of breaking down coal which has been previously undermined, we have found it to be of the greatest importance that the transverse sectional areas of the ramsin said presses should be maintained as large as ever possible compared with the diameter of the bar or cylinder in which the series of said rams is mounted to operate, and, further, that the traverse or distance through which said rams are moved radially from their bar should also be maintained or prepared. to act to as great an extent as the sizes of the several parts will permit, while at all times it is desirable that the pumping mechanism forming part of the apparatus should be as well fitted for easy application as are the several other parts belonging thereto. To produce mechanism or apparatus that shall embody these advantages is the object of our present invention, and in order that the same may be readily understood we have hereunto appended sheets of drawings illustrative thereof, in which- Figure l is a plan view of a hydraulic press containing a series of rams made in accordance with our invention. Fig. 2 is a sectional end elevation of parts shown by Fig. 1. Fig. 3 is a similar view to Fig. 2, but shows the rams in their extended positions. Fig. it is a sectional elevation of our improved press with the rams removed. Figs. 5, 6, and 7 are front, end, and top views, respectively, of our improved hydraulic press, illustrating the application thereto of a part hereinafter described. Fig. 8 is a sectional elevation of our improved pump and. parts connected therewith. Fig. 9 is a sectional plan taken on the line 00 y of parts shown by Fig. 8. Fig. 10 is a side view, partly in section, of certain Serial No. 725,845. (No model.)

of the parts illustrated by Figs. 8 and 9. Fig. 11 is a sectional plan view illustrating the method of construction of certain of the parts connected with the water cylinder or tank.

Similar letters and figures of reference indicate similar parts throughout the several views.

We attain the object of our invention by constructing each ram in the series of a dupleX formation, one portion, a, of same operating within the other, I), which thus forms its cylinder, while the bar 0 forms the cylinder for each of the series of outer rams b. By increasing the base of said ram a it works within the cylinder 0, formed in the bar 0, an opening 01 (shown in broken lines, Figs. 2 and 3) being made through the ram (1, so that the water may flow to act between the two rams a and b. The leather or like packing- 7o rings 6 e are secured to the ram a by means of the projecting screws f f and nuts 9 g, so that ample space is afforded between the surfaces of the rams a and b and those of the cylinders against which the water presses; to enable said water to act upon said packingrings 6 e to cause them to form perfect joints.

Through the walls of the outer ram 1) an opening Z2 is made to allow the water to escape when said outer ram b has reached the extent of its outward movement, as shown by Fig. 3, while the ram a is prevented from being forced out of its cylinder 0 by its flange a coming into contact with the plate h, surrounding and overhanging said cylinder 0' and secured to the bane bynuts h. This arrangement and formation of the rams a and 1) enables us to keep the area of the outer ram 1) as large as if only one'of such rams a or b was used, and at the same time the pressure of the water which forces them radially from the main cylinder 0 is not entirely withstood by the plate h retaining the inner rain o because the pressure of water in the space within the outer ram as nearly equalizes the 9 5 pressure within the cylinder c as the area of the outer end of the ram a is'to the area of the inner end of said ram a. Since the area of the inner end of the ram a is slightly in excess of the area of its outer end, the pres- Ioo sure of the water tends first to force out both rams together until the inner ram a is stopped by the plate h, after which the outer ram is forced outward from over the inner ram until the port I) is exposed. Owing to the fact 'that the outer ram slides outside of the inner ram instead of sliding within it, the utmost possible transverse sectional areas of the rams are afforded for the action of the waterpressure.

In order to prevent the rams h from being forced into the coal too easily and thus fail to distribute their pressure over a large area thereof, as would be the case where any soft places occurred in said deal, we form the flange M to extend radially from said ram s b, so that a much greater surface is presented to the coal. Thus the liability of tlie rams I) to merely embed themselves in the material being mined and in this manner not effect its breakdown is greatly diminished.

Owing to the fact that the series of rams carried by the bar a are unobstructed, so that each ram-head may be projected to any distance permitted by the relative degrees of a hardness of the coal, each ram-head is permitted to act in its particular location on the coal, and since the flanges or heads m project from the spaces between the rams, so that the edges of said flanges or heads nearly abut against each other, the said flanges or heads act practically on a continuous longitudinal surface of the coal instead of in detached places, said'heads stillbeing free or unobstructed, so that each may act to a more or less extent without being limited by the projection of any other ram of the series. We preferably follow such a construction of the rams a and b and cylinders c that those more nearly approaching the outer end 0 are larger in area in cross-section than are those approaching the other end, so that greater force maybe exerted upon the coal approaching its fixed side than there is approaching its open side.

We form grooves or furrows n in the bar 0 to enable the water to percolate or flow from the supply-pipe 0, connected with the pump, to exert its pressure on the rams a and I) in the above-described manner.

In the production of a pump to operate in conjunction with the above-described apparatus we make use of the simple form of plungerp and valves 19 and p and these we connect by means of the pipe q, containing the valve g to the barrel g, which is preferably capable of holding a sufficient quantity of Water to supply all the rams a and b. When the requisite amount of water has been drawn from the barrel q and forced through the pipe 0 into the cylinders to operate the rams a and b, said water may be allowed to flow back into the barrel g by. opening the valve 0 in the pipe 0. The lever r for operating the plunger p is mounted in bearings r, which are movable along the upright bar or rod 3, and

which are clamped thereto by the bolt t and nut i. The barrel u of the pump 19 is attached to the part 0" of the pipe 0 (which is secured at its other end to the bar 0 by being screwed thereon) by said part 0 being screwed. over the flange u, or the outer part 0 may be integral with the part it and the flange it, formed on the pipe 0. It will be seen that by the barrel q being connected to the pipe 0 by means of the bayonet-joint and by the part 0" of the pipe being screwed over the flange 21 the pipes 0 ando may be readily detached from the barrel (1 and pump barrel a; so also can the lever r be detached from its bearings r and the plunger withdrawn from its barrel. Hence the, several parts of the apparatus can be readily con veyedfrom one place to another and can also be easily fitted together at any time.

Such being the nature and object of our invention, what we claim is 1. In a hydraulic press of the character described, a series of duplex rams each ram of the series comprising an inner member or,

ram movable within a cylinder and an outer member or ram inclosing the outer end of the inner ram and movable thereon.

2. In a hydraulic press of the character described, the combination with the bar 0 having a series of cylinders c, of a ram (0 movable within each of said cylinders, and a ram Z) fitted to each of the rams (t and inclosing the outer end thereof.

3. In a hydraulic press of the character described, the combination with the bar 0 and a plurality of rams carried thereby, each of said rams having an independent unobstructed outer convex-faced flange or head projecting over the spaces between said rams.

4. In a hydraulic press of the character described, a duplex ram comprising an inner member or ram movable within a cylinder and an outer member or ram inclosing the outer end of the inner ram and'movable thereon, said outer member or ram being provided with an escape-opening l) in its wall.

In testimony whereof we have affixed our signatures in presence of two witnesses.

ALFRED JOSEPH TONGE. JAS. TONGE, JR. ELAM EAVES. \Vitnesses:

JOHN WHITEHEAD, DAN DUTTON. 

